/5 Science Quiz (for 12 to 16 years old): Quiz 20 1 / 5Which of the following is an element? Emerald Diamond Sapphire Ruby 2 / 5Which metal pollute the air of a big city? Chromium Lead Copper Cadmium 3 / 5In fireworks, the green flame is produced because of mercury sodium barium potassium 4 / 5LPG consists of mainly methane, butane and propane methane, ethane and hexane ethane, hexane and nonane methane, hexane and nonane 5 / 5Which of the following is the lightest metal? Lithium Lead Silver Mercury Your score is 0% Restart quiz Next quiz Please rate the quiz Send feedback By WordPress Quiz plugin
